| Regimental number | 3261 |
| Place of birth | London England |
| Religion | Presbyterian |
| Occupation | Grocer |
| Address | Allan Douglas McDonald, 215 St Leonards Road, Ascotvale, Victoria |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Mother, Mrs Mary A Southgate, 59 Walter Street, Ascotvale, Victoria |
| Enlistment date | 27 July 1915 |
| Rank on enlistment | Private |
| Unit name | 22nd Battalion, 7th Reinforcement |
| AWM Embarkation Roll number | 23/39/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A73 Commonwealth on 26 November 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 7th Battalion |
| Fate | Returned to Australia 26 August 1916 |
| Miscellaneous details (Nominal Roll) | *Arch spelt Archibald |